Subfields sorted when sending catalog records to the server

Description:Inserting a second subfield a to a 260 field (below the first one) and then saved the record to the server, the second subfield a was shunted to the bottom. After correcting this and saved the record again all was OK. Edit field has second line set to filter for subfields but not change order (col 8) and its ID is D in col 4 (according to edit_doc_999). Please explain why this happens

Resolution:When saving the record to the server in cataloguing the record subfields are not sorted. The order is left as entered. The only subfield that is sorted is determined in tab_fix by expand_doc_sort which uses tab_expand_sort where 852 only is listed.